<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./css/iconfont.css">
  <style>
    #collection {
      width: 700px;
      height: 700px;
      margin: 100px auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-around;
    }
    #collection .line {
      width: 100%;
      flex: 1;
      display: flex;
      align-items: center;
    }
    #collection .line div {
      flex: 1;
      text-align: center;
    }
    #collection .line div span {
      width: 150px;
      height: 150px;
      line-height: 150px;
      /* background-color: #ccc; */
      box-shadow: 0 0 30px 30px rgba(220, 220, 220, 0.3), 
      inset 0 0px 20px 20px rgba(220, 220, 220, 0.6);
    }
    #collection .line div span:hover {
      /* background-color: rgba(204, 204, 204, 0.411); */
      box-shadow: 0 0 30px 30px rgba(220, 220, 220, 0.3), 
      inset 50px 50px 50px 0px rgba(220, 220, 220, 0.6);
      /* transition: all 0.9s linear; */
    }
  </style>
</head>
<body>
  <section id="collection">
    <div class="line1 line">
      <div><span class="iconfont icon-QQ"></span></div>
      <div><span class="iconfont icon-chrome"></span></div>
      <div><span class="iconfont icon-youtube"></span></div>
    </div>
    <div class="line2 line">
      <div><span class="iconfont icon-QQ"></span></div>
      <div><span class="iconfont icon-chrome"></span></div>
      <div><span class="iconfont icon-youtube"></span></div>
    </div>
    <div class="line3 line">
      <div><span class="iconfont icon-QQ"></span></div>
      <div><span class="iconfont icon-chrome"></span></div>
      <div><span class="iconfont icon-youtube"></span></div>
    </div>
   
  </section>

</body>
</html>